B3311331313231311331322331333131133133313111333133313331323221221   >>    B331133131323131133132233133313113313331311133313331333132322122   <<    B3311331313231311331322331333131133133313111333133313331323221223   >>      B3311331313231311331322331333131133133313111333133313331323221222   >>